Malicious PDF — malware analysis report

Static analysis result for SHA-256 262ea2f93360b03f…

MALICIOUS

PDF

73.4 KB Created: 2021-02-05 00:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 46de7a5a506a1ff2f2af0a53ac26f305 SHA-1: 9d0f0f5ec12be33eb6a94c08d17b93b2e87fbc7f SHA-256: 262ea2f93360b03f041d1499fff9c05ec11c8b9ee44ae8b90dec21f35f1089db
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or redirecting users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the document's structure and embedded links suggest it's designed to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/123?utm_term=a+raisin+in+the+sun+essay+about+dreams In PDF document text
    • https://jotukodapoze.weebly.com/uploads/1/3/4/6/134632246/051662f5d0.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/44973868878b.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/for_freedom_s_sake_summarymf3tl.pdfIn PDF document text
    • https://gezagijuxeson.weebly.com/uploads/1/3/1/8/131872295/5525096.pdfIn PDF document text
    • https://sepuvoguzunisam.weebly.com/uploads/1/3/4/4/134488558/1003134.pdfIn PDF document text
    • https://pexegiwu.weebly.com/uploads/1/3/4/5/134526087/kolusa-kapumaketo-lusibuxotatel-bewinubilebige.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/EicWijt/em_dash_in_wordpress.pdfIn PDF document text
    • https://burazukukoxuvi.weebly.com/uploads/1/3/4/0/134096138/fujijaka.pdfIn PDF document text
    • http://trells.space/os_x_snow_leopard_download_freei0z64.pdfIn PDF document text
    • http://bubble1.space/jaxaridejufimubuxajpdalb.pdfIn PDF document text
    • http://topfrag.rip/new_orleans_tattoo_ideasbefgm.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/2732281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masusekokuberex.rf.gd/powerpoint_presentation_outline_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/sachin_a_billion_dreams_movie_ringtone.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 5264 bytes
SHA-256: d2352e2a513bb5bb95a7f441ef019a4f21ed30baa6654b0590d32e1cb6c82749
font_01_sfnt_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 10080 bytes
SHA-256: 1330e09181626d9a908c2b10788a0d2b7a0beb4f5adbc1fc45f73cf9de76118e

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